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105 lines
2.9 KiB
C++
105 lines
2.9 KiB
C++
#include <IO/WriteHelpers.h>
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#include <inttypes.h>
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#include <Common/hex.h>
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namespace DB
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{
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template <typename IteratorSrc, typename IteratorDst>
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void formatHex(IteratorSrc src, IteratorDst dst, const size_t num_bytes)
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{
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size_t src_pos = 0;
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size_t dst_pos = 0;
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for (; src_pos < num_bytes; ++src_pos)
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{
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writeHexByteLowercase(src[src_pos], &dst[dst_pos]);
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dst_pos += 2;
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}
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}
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void formatUUID(const UInt8 * src16, UInt8 * dst36)
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{
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formatHex(&src16[0], &dst36[0], 4);
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dst36[8] = '-';
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formatHex(&src16[4], &dst36[9], 2);
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dst36[13] = '-';
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formatHex(&src16[6], &dst36[14], 2);
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dst36[18] = '-';
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formatHex(&src16[8], &dst36[19], 2);
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dst36[23] = '-';
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formatHex(&src16[10], &dst36[24], 6);
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}
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/** Function used when byte ordering is important when parsing uuid
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* ex: When we create an UUID type
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*/
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void formatUUID(std::reverse_iterator<const UInt8 *> src16, UInt8 * dst36)
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{
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formatHex(src16 + 8, &dst36[0], 4);
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dst36[8] = '-';
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formatHex(src16 + 12, &dst36[9], 2);
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dst36[13] = '-';
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formatHex(src16 + 14, &dst36[14], 2);
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dst36[18] = '-';
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formatHex(src16, &dst36[19], 2);
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dst36[23] = '-';
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formatHex(src16 + 2, &dst36[24], 6);
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}
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void writeException(const Exception & e, WriteBuffer & buf, bool with_stack_trace)
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{
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writeBinary(e.code(), buf);
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writeBinary(String(e.name()), buf);
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writeBinary(e.displayText(), buf);
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if (with_stack_trace)
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writeBinary(e.getStackTraceString(), buf);
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else
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writeBinary(String(), buf);
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bool has_nested = false;
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writeBinary(has_nested, buf);
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}
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/// The same, but quotes apply only if there are characters that do not match the identifier without quotes
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template <typename F>
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static inline void writeProbablyQuotedStringImpl(const StringRef & s, WriteBuffer & buf, F && write_quoted_string)
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{
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if (!s.size || !isValidIdentifierBegin(s.data[0]))
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{
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write_quoted_string(s, buf);
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}
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else
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{
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const char * pos = s.data + 1;
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const char * end = s.data + s.size;
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for (; pos < end; ++pos)
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if (!isWordCharASCII(*pos))
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break;
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if (pos != end)
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write_quoted_string(s, buf);
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else
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writeString(s, buf);
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}
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}
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void writeProbablyBackQuotedString(const StringRef & s, WriteBuffer & buf)
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{
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writeProbablyQuotedStringImpl(s, buf, [](const StringRef & s_, WriteBuffer & buf_) { return writeBackQuotedString(s_, buf_); });
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}
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void writeProbablyDoubleQuotedString(const StringRef & s, WriteBuffer & buf)
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{
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writeProbablyQuotedStringImpl(s, buf, [](const StringRef & s_, WriteBuffer & buf_) { return writeDoubleQuotedString(s_, buf_); });
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}
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void writeProbablyBackQuotedStringMySQL(const StringRef & s, WriteBuffer & buf)
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{
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writeProbablyQuotedStringImpl(s, buf, [](const StringRef & s_, WriteBuffer & buf_) { return writeBackQuotedStringMySQL(s_, buf_); });
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}
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}
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